Stercorarius nigricapillus Bergman, Fauna och Flora, vol. 18, No. 5, 1923, p. 232= Stercorarius pomarinus Temminck, 1815
Syntype : Male ad., (dark phase), Pianja Bay, South-eastern Kamtchatka. 4. VIII. 1922. S. Bergman leg. No. 607. - Measurements of type : wing : 359 mm.; tail : 229 mm.; culmen : 36 mm.; tarsus : 48 mm.Click on the picture for enlargement.